Algol, known as The Hero King in legend, obtained the cursed sword Soul Edge very long ago. His dominate will and thirst for power allowed him to avoid being controlled by Soul Edge. He was the main antagonist in Soucalibur IV, even still there were moments where he showed how noble he was. He appeared along side Nightmare as one of the final battles in the game. He returns to Soulcalibur V as an unlockable character.

Algol is a man that thirsts for power and can never have enough of it. His search for power culminated with Soul Edge. With his dominating will he was able to avoid being controlled by the cursed sword.

His son was envious of this power and was drawn to the sword. Taking the sword for himself with no knowledge of it, Soul Edge took controll over him. Algol realizing what had happened when into battle with his son. With a fatal blow, he defeated his son taking back his sword. But his son was lost.

This event forced Algol to create a sword in hopes of keeping the cursed sword in check. Through magical shards and assisstance from sages he had many attempts at creating such a sword. Algol failed many times, with his final attempt his life was sacrificed but out of it came the spirit sword, Soul Calibur.

The sword, however, was similar to Soul Edge. The guardians that was tasked to watch over the sword successfully sealed the Algol's soul. Algol then became a part of legend.

When Soul Edge and Soul Calibur clashed, the two swords resonated with one another. A powerful event known as the Evil Seed occured. Algol's soul felt the power of the two swords clash and used that power to create a body for himself and a tower to reside in. The body resembled what he was before he fell.

Algol knows his soul is not able to sustain a physical form forever. He would need Soul Calibur and Soul Edge in order to keep living. He created two weapons out of his memories of the spirit sword and memories of the cursed sword.